Bearing.



L. '0. TRENT. Y BEARING. APPLICATION FILED MAR. 21, 1906. RENEWED APR.22, 1909.

937,974. 4 Patented Oct. 26,1909.-

Ffngl.

LAMARTINE C. TRENT, OF SAN FRANCISCO, CALIFORNIA.

BEARING.

Application filed March 21, 1906, Serial No. 307,281.

Specification of Letters Patent.

Patented Oct. 26, 1909.

Renewed April 22, 1909. Serial No. 491,597.

To all whom it may concern:

Be it known that I, LAMARTINE G. TRENT, a citizen of the United States,residing at the city and county of San Francisco, State of California,have invented certain new and useful Improvements in Bearings; and I dohereby declare the following to be a full, clear, and exact descriptionof the same.

The present device is designed for use as a bearing for verticallydisposed shafts and horizontally rotatable devices, such as agitators,working within liquid material such as pulp, slimes, concentrates, whichcarry sand, grit, dirt and other substances which quickly wear away andcut the bearing; the object of the invention being to protect thebearing against the action of the grit, sand, dirt and other substancescarried by the fluid within which the bearing is submerged, thusprolonging the life of the bearing and providing for an easier workingof the parts operating therein than where the bearing is exposed andsubjected to the cutting action of the grit, contained in the materialwithin which the bearing is submerged.

To comprehend the invention reference should be had to the accompanyingsheet of drawings, wherein Figure 1 is a vertical sectional view of anagitator for pulp, the bearing being illustrated in adjusted positionrelative to the horizontally rotatable agitator; and Fig. 2 is a detailvertical sectional view of the bearing.

In the drawings the numeral 1 is used to indicate the rotatable memberof the bearing', which member works within the bearing seat 2, formed inthe stud 3 upwardly projecting from the base plate 4.

The member 1 may constitute the lower end of a horizontally rotatableshaft, although in the present case it is indicated as a downwardextension, of a head plate 5, which plate is secured within acounter-sunk seat 6 in the under face of a horizontally rotatabledistributor 7. From this head plate 5, which may constitute a collar ofthe rotatable member 1, depends a circular flange 8, which flangesurrounds the stud 3, of the base plate 4. In the present case the saidbase plate 4 is attached by bolts 9 to the bottom 10 of the receivingtank 11.

The depending circular flange 8 is of somewhat greater diameter thanthat of the socketed stud 3, so as to leave an annular chamber 12between the rotatable member 1 and the fixed part or stud 3. The saidflange 8 terminates a slight distance above the base plate 4, so as toestablish communication between the annular chamber 12 and the outside.As the material in which the rotatable parts are to work is fed into thereceiving tank 11 and. rises above the point 13, the air is imprisonedin the annular air chamber 12, and as the liquid rises in the vat, itproduces a pressure on the air proportional to the head of liquid in thevat, which prevents any of the dirt or gritty substance contained in theliquid within which the bearing is submerged from gaining ac cess to thebearing seat 2 of the rotatable member 1, thereby securely protectingthe said bearing seat from being cut or worn, as is the result where thegritty, cutting material has free access to the bearing seat for therotating member working therein.

To more effectually protect the bearing seat, the base plate 4 may beformed with a circular flange 14, which flange extends upwardly a shortdistance beyond the lower edge of the circular flange 8, and forms anannular chamber 15 for the holding of a body of quick-silver to form aseal for the air within the chamber 12.

It is obvious that the described invention may be utilized in connectionwith any rotatable device the bearing'of which is a submerged one.

Having thus described the invention, what is claimed as new and desiredto be protected by Letters Patent is- 1. A submerged bearing forhorizontally rotatable devices, the same comprising a tubular studconstituting a bearing seat for the rotatable member, and the rotatablemember comprising a head plate, a shaft extending downwardly from thehead plate and loosely fitting within the tubular stud, the shaft beingconstructed to support the head slightly above the upper end of thestud, and an annular flange extending clownwardly from the head plate tosurround the stud and terminating short of the lower end of the studwhereby is provided an air cham- I ber between the flange and stud, theparts of the bearing being constructed to confine the air in saidchamber.

2. In combination, a vat adapted to contain liquid material to beworked, a submerged bearing in the vat for horizontally rotatabledevices, the same comprising a fixed member and a rotatable memberworking therein carrying an integral dependent flange upwardlyprojecting from the base 10 circular flange, the lower edge of theflange of the fixed member to a point slightly above being adjacent thebase of the fixed member, the lower edge of the depending flange of thesaid fixed and rotatable members being thev rotatable member.

constructed and arran ed to form therebetween an annular air c liamber,the liquid as TRENT it rises in the vat producing a pressure onWitnesses:

the air in said chamber proportional to the N. A. AGKER,

height of the liquid in the vat, and a circular I D. B. RICHARDS.

